Methyl 4-nitro-2-(trifluoromethoxy)-3-(trifluoromethyl)pyridine-5-carboxylate
Methyl 3-nitro-5-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-2-carboxylate
Methyl 3-nitro-5-(trifluoromethoxy)-4-(trifluoromethyl)pyridine-2-carboxylate
Ethyl 2-nitro-3-(trifluoromethoxy)-6-(trifluoromethyl)pyridine-4-carboxylate